Journal
APPLIED PHYSICS LETTERS
Volume 90, Issue 2, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2431453
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The authors have developed a method for electrical polarization of nuclear spins in quantum Hall systems. In a breakdown regime of odd-integer quantum Hall effect (QHE), excitation of electrons to the upper Landau subband with opposite spin polarity dynamically polarizes nuclear spins through the hyperfine interaction. The polarized nuclear spins in turn accelerate the QHE breakdown, leading to hysteretic voltage-current characteristics of the quantum Hall conductor.
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